[Java知识库]Java Copy文件夹及子文件

//copy directory and files
    public static void copyDir(String oldPath,String newPath) throws Exception{
        File src = new File(oldPath);
        File tar = new File(newPath);
        File[] fs = src.listFiles();

        //create target directory
        if(!tar.exists()){
            tar.mkdirs();
        }

        //get current dir's files and dirs
        for(File f:fs){
            if(f.isFile()){
                //copy file
                copyFile(f,new File(newPath+"//"+ StringUtils.replace(f.getName()," ", "_")));
            }else if(f.isDirectory()){
                //recursion
                copyDir(f.getPath(),newPath+"//"+ StringUtils.replace(f.getName(), " ", "_"));
            }
        }
    }

//copy files
public static void copyFile(File src,File tar) throws Exception{
    //create inputStream buffer
    FileInputStream fis = new FileInputStream(src);
    BufferedInputStream bif = new BufferedInputStream(fis);

    //create outputStream buffer
    FileOutputStream fos = new FileOutputStream(tar);
    BufferedOutputStream bos = new BufferedOutputStream(fos);

    //buffer array
    byte[] bs = new byte[1024];
    int len;
    while((len=bif.read(bs))!=-1){
        bos.write(bs,0,len);
    }
    bos.flush();


    //close stream
    fis.close();
    fos.close();
    bif.close();
    bos.close();

}